* Create and glue ExternalPublicRoomsProvider into the public rooms component
This is how we will link p2p stuff to dendrite proper.
* Use gmsl structs rather than our own
* Implement federated public rooms
- Make thirdparty endpoint r0 so riot-web loads the public room list
* Typo
* Missing callsites
* Wire up publicroomsapi to roomserver events
* Remove parameter that was incorrectly brought over from p2p work
* nolint containsBackwardExtremity for now
